/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

Description
    Test PatchEdgeFaceWave.

\*---------------------------------------------------------------------------*/

#include "argList.H"
#include "Time.H"
#include "fvMesh.H"
#include "volFields.H"
#include "PatchEdgeFaceWave.H"
#include "patchEdgeFaceInfo.H"

using namespace Foam;

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

int main(int argc, char *argv[])
{
    argList::validArgs.append("patch");

#   include "setRootCase.H"
#   include "createTime.H"
#   include "createMesh.H"

    const polyBoundaryMesh& patches = mesh.boundaryMesh();

    // Get name of patch
    const word patchName = args[1];

    const polyPatch& patch = patches[patchName];

    // Data on all edges and faces    
    List<patchEdgeFaceInfo> allEdgeInfo(patch.nEdges());
    List<patchEdgeFaceInfo> allFaceInfo(patch.size());

    // Initial seed
    DynamicList<label> initialEdges;
    DynamicList<patchEdgeFaceInfo> initialEdgesInfo;


    // Just set an edge on the master
    if (Pstream::master())
    {
        label edgeI = 0;
        Info<< "Starting walk on edge " << edgeI << endl;

        initialEdges.append(edgeI);
        const edge& e = patch.edges()[edgeI];
        initialEdgesInfo.append
        (
            patchEdgeFaceInfo
            (
                e.centre(patch.localPoints()),
                0.0
            )
        );
    }


    // Walk
    PatchEdgeFaceWave
    <
        primitivePatch,
        patchEdgeFaceInfo
    > calc
    (
        mesh,
        patch,
        initialEdges,
        initialEdgesInfo,
        allEdgeInfo,
        allFaceInfo,
        returnReduce(patch.nEdges(), sumOp<label>())
    );


    // Extract as patchField
    volScalarField vsf
    (
        IOobject
        (
            "patchDist",
            runTime.timeName(),
            mesh,
            IOobject::NO_READ,
            IOobject::AUTO_WRITE
        ),
        mesh,
        dimensionedScalar("patchDist", dimLength, 0.0)
    );
    scalarField pf(vsf.boundaryField()[patch.index()].size());
    forAll(pf, faceI)
    {
        pf[faceI] = Foam::sqrt(allFaceInfo[faceI].distSqr());
    }
    vsf.boundaryField()[patch.index()] = pf;

    Info<< "Writing patchDist volScalarField to " << runTime.value()
        << endl;

    vsf.write();


    Info<< "\nEnd\n" << endl;
    return 0;
}


// ************************************************************************* //
